Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | 9x 3x 6x 6x 4x 2x 9x 9x 9x 9x 9x 9x 9x | import * as d3 from "d3";
import { PinchSection } from "../henTypes";
// depending on where the pinch temperature lies in the entire temperature domain,
// classify whether it should be placed closer to the LEFT, RIGHT, or in the MIDDLE of the HEN diagram.
export function getPinchSection(
pinch?: number,
minT?: number,
maxT?: number,
): PinchSection {
if (
pinch == null ||
!isFinite(pinch) ||
!isFinite(minT!) ||
!isFinite(maxT!) ||
maxT! <= minT!
) {
return "MIDDLE";
}
const t = (pinch - minT!) / (maxT! - minT!); // 0..1
if (t < 1 / 3) return "RIGHT";
if (t > 2 / 3) return "LEFT";
return "MIDDLE";
}
// calcaulate actual x the pinch line should render at
export function getPinchX(
section: PinchSection,
svgWidth: number,
marginX: number,
): number {
const left = marginX;
const right = Math.max(left, svgWidth - marginX);
const band = d3
.scaleBand<PinchSection>()
.domain(["LEFT", "MIDDLE", "RIGHT"])
.range([left, right])
.padding(1)
.align(0.5);
return (band(section) ?? left) + band.bandwidth() / 2;
}
// convenience method to compute the pinch line now.
export function computePinchPlacement({
pinch,
minT,
maxT,
svgWidth,
marginX,
}: {
pinch?: number;
minT: number;
maxT: number;
svgWidth?: number;
marginX: number;
}) {
const pinchSection = getPinchSection(pinch, minT, maxT);
const pinchX = getPinchX(pinchSection, svgWidth || 0, marginX);
return { pinchX };
}
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